<!DOCTYPE HTML>
<html>

<head>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
  <title>JS代码的位置</title>
  <script type="text/javascript">
    document.write("I love");
  </script>
</head>

<body>
  <script type="text/javascript">
    document.write("javascript");
  </script>
</body>

</html>